Note 4 - Business Combinations (Details Textual) - USD ($)			3 Months Ended			6 Months Ended		9 Months Ended
	Mar. 31, 2024	Oct. 04, 2023	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024
Share Price	$ 2.37		$ 2.37			$ 2.37		$ 2.37
Stock Issued During Period, Value, Acquisitions				$ 1,924,000
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock			$ 158,000	527,000
Payment for Contingent Consideration Liability, Financing Activities						$ 219,000	$ (0)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability						44,000	$ 0
Contingent Consideration Liability [Member]
Stock Issued During Period, Value, Acquisitions			656,000
Additional Paid-in Capital [Member]
Stock Issued During Period, Value, Acquisitions				1,924,000
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock			158,000	527,000
Additional Paid-in Capital [Member] | Contingent Consideration Liability [Member]
Stock Issued During Period, Value, Acquisitions			656,000
Evertel Technologies, LLC [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)		986,486
Share Price		$ 1.95
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock			158,000
Business Combination, Contingent Consideration, Liability	$ 60,000	$ 890,000	60,000			60,000		$ 60,000
Business Combination, Consideration Transferred, Working Capital Adjustment		$ 15,000	15,000
Business Combination, Acquisition Related Costs			62,000	$ 12,000	$ 39,000			$ 113,000
Finite-Lived Intangible Asset, Useful Life		6 years 9 months 18 days
Business Combination, Contingent Consideration, Liability Settled						874,000
Payment for Contingent Consideration Liability, Financing Activities						219,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability						44,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			205,000			414,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			220,000			$ 432,000
Evertel Technologies, LLC [Member] | Holdback Liability [Member]
Business Combination, Contingent Consideration, Liability		$ 230,000
Evertel Technologies, LLC [Member] | Contingent Consideration Liability [Member]
Stock Issued During Period, Shares, Acquisitions	236,343					236,343
Evertel Technologies, LLC [Member] | Additional Paid-in Capital [Member]
Stock Issued During Period, Value, Acquisitions		1,924
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock		$ 527,000	$ 158,000
Evertel Technologies, LLC [Member] | Additional Paid-in Capital [Member] | Contingent Consideration Liability [Member]
Stock Issued During Period, Value, Acquisitions						$ 656,000